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Route Reliability

ITH → Washington

ITH–IAD · 250 miles · ITH Airport to Washington Dulles International Airport

67
Usually Fine
WanderNerd Reliability Score
81%
Arrive within 15 minutes
25 min
Average arrival delay
3.3%
Cancelled
837
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 81% of the time across 837 flights. No comparison to make.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 83% of the time, against 80% between 6–9 AM.

Sunday scaries are real for this one.

ITH–IAD flights arrived on time 86% of the time on Tuesdays. On Sundays: 73%.

Keep a backup plan handy.

This route was cancelled 3.3% of the time. Typical for U.S. flights is around 1–2%.

Ticking up lately.

ITH–IAD flights arrived on time 81% of the time over the last three months in the data, compared with 76% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon82%(114 flights)
  • Tue86%(116 flights)
  • Wed86%(108 flights)
  • Thu78%(116 flights)
  • Fri78%(117 flights)
  • Sat85%(118 flights)
  • Sun73%(117 flights)
On-time by departure window
  • 6–9 AM80%(353 flights)
  • 9 AM–12 PM83%(104 flights)
  • 6–9 PM82%(349 flights)
On-time trend by month
86%
May

Jun 78% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202578%60
July 202579%56
August 202579%61
September 202593%60
October 202585%87
November 202584%57
December 202581%59
January 202678%59
February 202669%54
March 202676%82
April 202682%88
May 202686%83

Keep nerding

Based on 837 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.